Packing.



PATBNTED 00T. 15, 1907.

J. W. SHIELDS.

PACKING. APPLIOATION FILED MAR. 12. 1907.

.Pkg A?- JAMES W, SHlELDS, OF HUBBELLJ MICHIGAN.

PACKING.

Specification of Letters Patent..

Patented Get. 15, 190'?.

Application filed March 12, 1907. Serial No. YSGZQBO.

tain new and useful Improvements in Parkings, of

which the following is a specicetion.

This invention provides packing for engine and pumping machinery being vespecially adapted for pistons operating in cylinders which ure closed et their ends and have the piston rod arranged to work through an opening or stuffing box in :i heed of the cylinder, the packing beingr yieldable to automatically compensate for any disalinement oi the piston rod.

In accordance with this invention, the packing ein- `bodies a yielflable or elastic core and an enveloping' portion of either textile or fibrous material, or a combination of iibrous inaterinl and metallic strands so nter- Woven as to provide a substantial end dul'able article which will resist. both weer and compressive or expansive stress,

For a full description of the invention and the merits thereof and also to acquire e knowledge ofthe details of construction and the means for effecting the result, ref erenceis tolle hai to theiollowing description and accompanying drawings.

While the invention may be adapted to different forms and conditions by cli2-..nge,= in the structure and minordetails without departing from the spirit or essential features thereof, still the preferred embodiment is shown in the accompanying drawings, .in which:

Figure 1 is a. perspective view of a pecking embodying a single yield-able or elastic core. Fig. 2 is 2L per-- spective view ol n modied forni of packing embodying n plurality of yieldablc or elastic cores. i

The essentiel features oi theinvention as hereinbefore stated is the yieldable or elastic core. This core l is usually lornied oi rubber although" it may be con-.

structed oi any material possessing elastic qualities so as to maintain the normal shape ol the packing in cross section, whereby when the pin-king is relieved oi compressive force, the elastic core regaining itself, w ill cause the packinlgr to essuineiis originel form or shape.

The material 2 enveloping the core l may 'oe fibrous and composed either of textil e or mineral wool or a combination of ibrous und metallic trends interwoven tr, produce a substantial and wear resisting `packing which will susniin heavy stress. The packing may have any cross section-il outline and this is true oi the core. v

In the construction shown in l 2, the peeking embodies a series or plurality of cores, otherwise it is of substantially the saine construction as liereinbefore specified. The plurnl. cores have :t parallelarrangeu ment and nro preferably seperated by fibrous Hmteriol. This forni of packing is more elastic than that disclosed in Fig. .l and is preferred in seine types of engines or pumps particularly where the piston rofl is liable to have any appreciable play troni :in axial line.

Having tuus described the invention, what is claimed as new is: A I

1. A packing comprising im elastic core. .unda body por'- tion enveloping the core 'und consisting of interwoven."

fibrous und metallic strands.

L. A packing comprising.;- n tnbula: lelastic core. and s..

body portion enveloping l'ne coro und consisting of interwoven fibrous znid metallic strands.

2?.,A packing comprising u plurnlity nl! tubular. el le cores arranged in parallel relation to each other, sind :i body portion enveloping the cov woven fibrous and nie ic str-an ln testimony whereor I affix my signature in presence of two witnesses l sinne W. snuitns. rn si Farini-:met

1nd consisting of inter The core l is hollow, thereby further adding lo its elasticity.- 

